Door lock



SePt- 5, 1944- v w. R. scHLAGE 2,357,551

DOOR LOCK Filed April 21. 1941 2 Sheets-Sheet 1 'En 1. 30 zg 22 /W/ l 'll T.- Y I: T

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Sept. 5, 1944. w. R. scHLAGE DOOR LOCK Filed April 21, 1941 2 Sheets-Sheet 2 Patented Sept. 5, 1944 DOOR LOCK Walter R. Schlage, Burlingame, Calif., assignorio Schlage Lock Company, San Francisco, Calif., a corporation of California Application April 21, 1941, serial No. 389,512

(ci. 'zo-14s) I6 Claims.

This invention relates to a door lock which is provided with two latch bolts.

The object of the present invention is generally to improve and simplify the construction and operation oi' door locks oi' the character described; to provide a door lock in which the projected or retracted position of a main latch bolt is controlled by an inner or an outer spindle, and the position oia secondary'latch bolt is controlled by means within the spindles: to provide pushbutton actuated means operable through the inner spindle to control the position of the secondary latch bolt; to provide key 'actuated means in the outer spindle to controlr the position of the secondary latch bolt; to provide means for simultaneously clogging the outer spindle against rotation or operation when the secondary latch boltv is extended; to provide means whereby rotation of the inner spindle or the depression of the secondary latch bolt when assuming a projected position will restore it to a retracted position, and at the same time undog vthe outer spindle; and further, to provide means whereby key actuation through the outer spindle may retract the secondary latch bolt and simultaneously undog the outer spindle.

The door lock is shown by way of illustration in the accompanying drawings, in which Fig. l is a horizontal longitudinal section taken n line I -I of Fig. 2;

Fig. 2 is a vertical longitudinal section taken on line II--II of Fig. 1;

Fig. 3, is as ection similar to Fig. l showing the secondary latch bolt projected and the outer spindle dogged against rotation;

Fig. 4 is a perspective view of the secondary latch bolt and the retractor plate to which it is secured:

Fig. 5 is a perspective view of the main latch4 bolt together with the retractor plate to which it is secured;

6 is a perspective view of a key actuated tumbler cylinder;

Fig. 7 is a perspective view of the pushbutton and the bar actuated thereby; Fig. 8 is a perspective view of the outer spindle; and

Fig. 9 is a perspective view of the inner spindle.

Referring to the drawings in detail, and particularly to Figs. l to 3, A indicates a portion of a door to which is suitably secured a lock housing consisting of two side plates 2 and 3 which are Joined at their outer ends by a face plate 4. Secured between the plates 2 and 3 of the lock housing isa U-shaped frame consisting of upper and lower horizontally extending arms 5 and4 6. connectedat their rear ends by an end member l, and provided'atftheir forward ends with rightangular lugs l whichare secured to the face plate 4 (see Fig. 2) by rivets, countersunk screws or the like. as shown at 9.

'I'he lock contains a main and a secondary latch bolt, indicated at It and Ilia respectively. They extend through an opening il formed in the face plate, and are guided thereby. The main latch bolt is secured topa'eretractor plate generally indicated at B. plate, together with the latch bolt, is best shovin in Fig. 5. The plate is rectangular in shape and has an elongated opening formedtherein as shown at l2, through which the inner and oi'ite'r spindles, hereinafter to be referred to, extend." The plate isfprovided with two guide lugs l2-i3 which extend into slots ll-II formed iii'- the-arms 5 and 6 of the U- shaped frame, and it isprovided at its rear end with a head member I 5 on which is formed a pair of shoulders i8 and a notch Ita which straddles a bar l2 hereinafter to be described.

The secondarylatch bolt Ita is also secured to a plate which is generally indicated at C (see Fig. 4). It isrectangular in shape and has an elongated opening formed therein as shown at i2a. Its rear end is provided with a head i8, as shown. It presents a front face I 8a which engages the bar 22 at all times, as will hereinafter -llie described. and it also carries a dogging lug Formed on the side plates 2 and 3 of the main lock housing are outwardly projecting annular anges or hubs V2li and 2|. These hubs form bearings for a pair of tubular spindles generally indicated at 22 and 23. (see Figs. l, 3, 8 and 9). The spindle 22 will hereinafter be referred to as the outer spindle' and the spindle .23 as the inner spindle. The outer spindle, shown in Fig. 8, has a reduced portin 22 and an enlarged portion 22a. This enlarged portion is cross-slotted as shown at 24 to form a rollback member 25, and the opposite sides of the/cross-slot are notched as shown at 26. to form openings into which the dog I8 of the secondaryretractor plate C may enter to dog the outer spindle against rotation or operation, as will hereinafter be described.

The inner spindle, shown in Fig. 9, is oi uniform diameter throughout its length, and the diameter is such that it will telescope with and snugly fit the interior of the enlarged portion 22a of the outer spindle. also crossfslotted as shown at 2l, and thereby forms a rollback member indicated at 28. The

The inner spindle is outer spindle 22 is journaled in both of the bearings indicated at 20 and 2| carried by the side plates 2 and 3 of the lock housing. The inner spindle, on the other hand, is journaled within the outer spindle, or the enlarged portion 22a thereof. The spindle 22 has a. knob 30 secured thereto which will hereinafter be referred to as the outer knob, and the inner spindle 23 has a knob 3| secured thereto which will hereinafter be referred to as the inner knob. y

Extending through the inner knob and the spindle 23 is a bar 32 (see Figs. 1, 2, 3 and '1). This bar is circular in cross section and snugly nts the interior of the inner spindle. Its outer end is provided with a. pushbutton 33 and a collar 34. This collar engages the outer end of the spindle, and an annular shoulder 36 on the inner knob overlies it, so that outward movement of the rod 32 and the pushbutton 33 will be limited. The pushbutton and bar, however, may be moved inwardly with relation to the inner knob 3| and the inner spindle, as'the inner spindle terminates -at the point 23a (see Figs. 1 and 2). In the inner end of the bar 32 are formed two cross-slots indicated at 35 and 35a. These slots face in opposite directions and their function will hereinafter be described. Also formed on the inner end of the bar is a lug 31. This is straddled or engaged by a pair of lugs 38 (see Figs. l, 3 and 6) which are formed on the inner end of a key actuated tumbler cylinder 48. This cylinder is mounted in the outer end of the outer spindle 22 and is secured against endwise removal therefrom by a collar 4I overlaid by an annular shoulder 42 formed on the knob 30. The outer spindle functions as a housing for the cylinder. -The tumblers 43 carried by the cylinder project into a slot 43a formed in the spindle, but when a key is inserted they are retracted from said slot and the cylinder can thus be rotated by means of the key. Such rotation is transmittedthrough the lugs 38 to the lug 31, and this in turn rotates the bar 32. Hence the bar is not only rotatable within the inner spindle but it is also longitudinally movable therein when pressure is exerted on the projecting pushbutton 33. The bar and pushbutton will, however, normally assume the extended position shown in Fig. l, as a spring 45 is interposed between the key-actuated tumbler cylinder and the inner end of the bar 32.

The purpose of the present invention is to provide a door lock having two latch bolts, to wit, a main and a secondary latch bolt, shown at I and Illa respectively, both or either of which may be projected or retracted with relation to the lock housing; to provide means whereby the main latch bolt may be retracted by rotation of either spindle, and the secondary latch bolt by rotation of the inner spindle only; to provide means whereby the position of the secondary latch bolt is controlled by the bar 32 either by key or manual operation thereof; to provide means for dogging the outer spindle against rotation when the secondary latch bolt is projected; and further, to provide means whereby the secondary latch bolt may be restored to retracted position when extended, either by rotation of the inner spindle by key actuation through the outer spindle, or by depression of the secondary latch bolt fromV the exterior of the lock, said retraction of the secondary latch bolt by any one of the means specified simultaneously undogging the outer spindle.

The position of the lock mechanism shown in Fig. l is its normal position, that is, the main latch bolt I0 is extended while the secondary latch bolt Illa ass imes its retracted position. In this position the main latch bolt may be retracted by rotation of either knob, as the dogging member I9 carried by the secondary retractor plate is held out of engagement with the notches 20 formed in the enlarged portion of the outer spindle. Two of these notches are shown, but

only one dogging lug is shown, hence only one notch would be required; two are, however, provided as shown in Fig. 8, so as to permit the lock to fit either left hand or'right hand installations, but it does not matter whether the clogging lug enters one notch or the other, as the spindle and outer knob will be dogged against rotation whenever the dogging lug enters one or another of the notches. Thus, if it is desired to open the door when the mechanism has assumed the position shown in Fig. l, it can be accomplished by rotation of either knob. For instance, if the inner ,knob is rotated the inner spindle 23 will also rotate, as the knob is secured thereto. 'I'he rollback member 28 formed on the inner spindle will in that instance engage one or another of the shoulders I6 formed on the head of the retractor plate B, and force this in a rearward direction against the action of the springs 46 interposed between the retractor plate and the rear bar 1 of the U-shaped frame. As the latch bolt and the retractor plate move rearwardly due to the action of the rollback member 28, the springs become compressed, and when the knob is released the retractor plate and latch bolt will again be projected; hence the normal position of the main latch bolt is a projected position, as it is held in this position by means of the springs 46. The same action will take place if the outer knob is rotated, as the rollback member 25 formed upon the outer spindle will also engage the shoulders I6, and thereby cause rearward movement of the retractor plate B and the latch bolt I0. This rearward movement, will again cause compression of the springs 46, and when the outer knob is released the parts will be returned to normal extended position.

If a person is in a room and desires to lock the door against all persons except those in possession of the proper key, it is only necessary for that person to push the button 33 inwardly. When that is done, the rod 32 will move inwardly against the tension of the spring 45, and the notch 35 will assume a position in which it aligns with the head I8 of the secondary retractor plate C; the moment this occurs, the head will drop into the notch 35, thus permitting the plate C and the secondary bolt Illa to assume the projected position shown in Fig. 3. The secondary latch bolt is in this manner projected, and the projection is accomplished by a spring such as shown at 41. In this position the door is double-locked, as both of the latch bolts are projected, and it may be said toy be triple-locked, as the outer spindle is dogged against operation due to the fact that the dog I9 has entered one or another of the notches 26 of the outer spindle when the secondary latch bolt is projected.

Thus by merely depressing the pushbutton, two things are accomplished: The secondary latch bolt is extended, and the outer spindle and knob are simultaneously dogged against operation,` and no one can enter except a person having the 1. When this happens the bar becomes released,

and the spring 45 will immediately project; it to cause the button to assume the extended position shown in Fig. 1.

If a person inside a room, after having locked the door, that is, after having depressed the pushbutton and thereby caused extension of the secondary latch bolt and dogglng of the outer spindle, desires to leave the room, that person will only have to rotate the inner knob and spindle. In doing so, the rollback member 28 will engage the shoulders I6 of the retractor plate B, to force it rearwardly as previously described, and when this happens the latch bolt I is obviously retracted, and rod 32 will bev released and will be extended to its normal position by the spring 45. The secondary retractor plate would obviously be retracted at the same time as the main retractor plate, as the rollback member 28 would not only engage the shoulders I6 of the main plate, but it would also engage the face I8a of the secondary retractor plate. 'I'hus both of the latch bolts are simultaneously retracted, and the bar 32 is released and projected to normal position, as shown in Fig. 1, and is thus completely undogged or unlocked and in position for normal operation, that is, the door may be opened by rotation of either the inner or the outer knob;

There is still one other method of releasing the dogging member and returning the secondary latch bolt to normal position, and that is by depressing the secondary latch bolt, when extended, from the exterior of the lock. Such depression may "be accomplished by forcing the thumb against the extended secondary latch bolt and pushing it inwardly, or it may be accomplished by merely closing the door, as when that happens the inclined faces on both latch bolts will strike the edge 50 of the striker plate, and will thus be forced inwardly, or depressed from the exterior of the lock. This is an important feature. For instance, a person not familiar with the lock might depress the pushbutton before leavingl the room, and then go out and close the door. In this case, both of the latch bolts would be pro- `iected, but when the door was closed they would both be depressed, and all mechanism would be restored to normal unlocked or undogged position. Thus, it is impossible to lock the door from the inside and then to leave the room, and this is desirable in certain instances, as a person might forget the key and would be unable to re-enter except Aby obtaining a master key, calling a locksmith, etc.

The only manner in which the door can be locked when a person leaves the room is from the outside, as it is necessary-for the person to insert a key in the outer` knob after closing the door, and to rotate the key cylinder, whereupon the notch 35a will assume a reverse position from that shown in Fig. 1. In that instance the head I8 of the secondary retractor plate will drop into the notch, due to the action of the spring 41, and the secondary latch bolt will be projected rotation of the outer knob the main latch bolt is retracted and the door opened.

Earlier in the specification it was stated that both the main retractor plate B and the secondary plate C had elongated openings formed therein, indicated at I2 and I2a respectively. These openings are provided merely to permit the spindles to pass through the retractor plates, and to permit free movement of the retractor plates when they are retracted by action of the rollback members, or by inward movement of the latch bolts by engagement with the striker plate, or by manual depression thereof; that is the reason for their elongated shape.

In the present structure, two spindles are shown for the purpose of retracting the latch bolts, but one spindle may be employed. Simllarly, the latch bolts may be arranged in tele- Y scoping relation instead of being placed one above the other as here shown. The single spindle structure, and a telescoping arrangement of the latch bolts, are fully disclosed in my co-pending application entitled Door lock, filed April 30,- 1941, Serial No. 391,024. .By referring to Figs. 1 and 2 it will be noted that the retractor plate C is disposed in front of the retractor plate B, and that the latch bolt I0 carried by the plate B is disposed below the secondary latch bolt Ina. This is important, as depression of the latch bolt I0 manually or by engagement with the striker plate will cause said bolt to move inwardly, and when it does so the inner end Illb will engage the forward end Illc of the retractor plate C, and cause this to move with plate B to retracted position, thereby undogging the outer spindle. Thus the outer spindie may be undogged by depression of either of the latch bolts.

In the description so far submitted, a main and a secondary latch bolt have always been referred to, and the secondary latch bolt is shown and described as having a beveled face (see Fig. 4) so that it will be depressed when it engages the striker plate, or the edge thereof indicated at 50. This bolt need not be beveled at its outer end, however; in fact, it will in many instances present a flat end as indicated by dotted lines at 5I (see Fig. 4), so as to function as a second or safety bolt in conjunction with the main bolt I0.

and at the same time the outer spindle will be dogged, and the door will thus remain locked until that person returns and again inserts the Again it is possible that in place of the secondary bolt Illa a projecting pin or plate may be employed, of the type disclosed in my co-pending application entitled Door lock actuated switch, led October 7, 1940, Serial No. 360,149, which will function as a switch actuator or for other purposes. While these and other features of the invention have been more or less specically described, I wish it understood that changes may be resorted to within the scope of the appended claims, a'nd that the materials ,and finish of the various parts employed may be as the experience of the manufacturer and differentv conditions of use demand.

Having thus described my invention what I fclaim and desire to secure by Letters Patent is:

1. In a door lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all.times to project both latch bolts, an inner spindle having a roll back member engageable to retract both latch bolts in unison or the main latch bolt only, an'outer spindle having a roll back member engageable to retract the main latch bolt, and means Within the spindles controlling the projected or retracted position of the secondary latch bolt. W

2. In a door lock, a main and a secondary latch bolt, both of which are projectable when the tion of the secondary latch bolt.

3. In a door lock, a main and a secondary latch bolt, both of which are projectable j when the door is closed, s'pring means tending at all times to project both latch bolts, an inner spindle having a roll back member engageable to retract both latch bolts in unison or the main latch bolt only, an outerspindle having a roll back member engageable to retract the main latch bolt, and a longitudinally movable member within the spindles controlling the projected or retracted positions of the secondary latch bolt.

4. In a door lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner spindle having a roll back member engageable to retract both latch bolts in unison or the main latch bolt only, an outer spindle having a roll back member engageable to retract the main latch boltand a key actuated member within the spindles controlling the projected or retracted position of the secondary latch bolt.

5. In a door lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner spindle having a roll back member engageable to retract both latch bolts in unison or the main latch bolt only, an outer spindle having a roll back member engageable to retract the main latch bolt, and a longitudinally and rotatably mounted member within the spindles controlling the projected or retracted positions of the secondary latch bolt.

6. In a door lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner spindle having :z

a. roll back member engageable to retract both latch bolts in unison or the main latch bolt only, an outer spindle having a roll back member engageable to retract the main latch bolt, and manually operated means within the spindles controlling the projected `or retracted position of the secondary latch bolt.

7. In a door lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner spindle having a roll back member engageable to retract both latch bolts in unison or the main latch bolt only, an outer spindle having a roll back member engageable to retract the main latch bolt, a member within the spindles controlling the position of the secondary latch bolt and key operated means for actuating said member.

8. In a door lock, a, main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner andan outer spindle, each having a roll back member whereby the main latch bolt is actuated, a member within the spindles controlling the position of the secondary latch bolt, key operated means in one spindle for actuating said member and a push button in the other spindle for actuating said member, said key operated means and the push button being independently operable.

9. In a door lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner and an outer spindle, each having a roll back member whereby the main latch bolt ls actuated, and means within the spindles controlling the position of the secondary latch bolt and simultaneously controlling a dogging member whereby the outer spindle is dogged, or undogged.

10. In a door lock, a main and a secondary latch bolt, both ol.' which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner andI an outer spindle, each having a `roll back member whereby the main latch bolt is actuated, a dogging member engageable with the outer spindle to render it inoperative, and means within the spindles controlling the position of the secondary latch bolt and the dogging member.

11. In a lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner and an outer spindle, each having a roll back member to retract the main latch bolt, means within the spindles controlling the position of the secondary latch bolt, and means operable upon projection of the secondary latch bolt for dogging the outer spindle, said means undogging the outer spindle when the inner spindle is rotated.

l2. In a lock, a main and a. secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner and an outer spindle, each having a roll back member to retract the main latch bolt, means within the spindles controlling the position of the secondary latch bolt, means operable upon projection of the secondary latch bolt for dogging the outer spindle, and key actuated means in the outer spindle for undogging the outer spindle.

13. In a lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, an inner and an outer spindle each having a roll back member to retract the main latch bolt, push button actuated means in the inner spindle controlling projection of the secondary latch bolt, means operable upon projection of the secondary latch bolt for dogging the outer spindle, and key actuated means in the outer spindle for undogging the outer spindle.

14. In a lock, a main and a secondary latch bolt, both of which are projectable when the door is closed, spring means tending at all times to project both latch bolts, a retractor plate on each latch bolt, an inner and an outer spindle, each having a roll back member engageable with the retractor plate of the main latch bolt to retract the same, a dog mounted on the retractor plate which actuates the secondary latch bolt, said dog engaging and dogging the outer spindle against operation when the secondary latch bolt is projected, and a member within the spindles controlling the position of the secondary latch bolt, together with its retractor plate and the dog carried thereby.

15. In a lock, a main and a secondary latch bolt, both of which are projectable when the door ls closed, spring means vtending at all times tos is closed, spring means tending at all times to project both latch bolts, a retractor plate on each latch bolt, an inner and an outer spindle, each having a roll back member engageable with the retractor plate of the` main latch bolt to retract the same, a dog mounted on the retractor plate which actuates the secondary latch bolt, said dog engaging and dogging the outer spindle against operation when the secondary latch bolt is projected, a member within the spindles controlling the position of the secondary latch bolt together with its retractor plate and the dog carried thereby, and key operated means in the outer spindle whereby the member within the spindles is actuated to retract the secondary latch bolt, and to simultaneously undog the outer spindle.

16. In a lock, a main and a secondary latch bolt, both of which are projectable when the door latch bolt and simultaneous clogging of the outerY spindle, and key operated means in the outer spindle, whereby the member within the inner spindle is actuated to retract the secondary latchl bolt and to simultaneously undog the outer spindie.

WALTER R. SCHLAGE. 

